| Frog heart chambers | 3 | 2 atria + 1 ventricle |
| Frog cranial nerve pairs | 10 | cf. 12 in mammals/humans |
| Haversian system | Concentric | Lamellae around central canal |
| Muscle nuclei: Skeletal | Many (peripheral) | Formed by myoblast fusion |
| Muscle nuclei: Smooth | 1 (central) | Single uninucleated spindle cell |
| Muscle nuclei: Cardiac | 1-2 (central) | Usually mono, sometimes binucleated |
| Areolar tissue key cells | 3 | Fibroblasts + Mast cells + Macrophages |
| Cartilage types | 3 | Hyaline + Elastic + Fibrocartilage |
| Epithelium types (simple) | 5 | Squamous, Cuboidal, Columnar, Ciliated, Glandular |
| Animal tissue types | 4 | Epithelial, Connective, Muscular, Neural |
| Frog heart accessory chambers | 2 | Sinus venosus + Truncus arteriosus |
| Frog respiration routes | 3 | Cutaneous + Buccopharyngeal + Pulmonary |
| Frog nitrogenous waste | Urea | Ureotelic; mesonephric kidneys |
| Portal systems in frog | 2 | Hepatic portal + Renal portal |